Question

((x + 3)^2 explanation of polynomials

Answer 1

Step-by-step explanation

The question wants us to expand the given expression

`(x+3)^2`

To expand this, we will have

`(x+3)^2=(x+3)*(x+3)`

We can now use the FOIL method of expansion

'

So that

`\begin{gathered} first=x* x=x^2 \\ outer=x*3=3x \\ inner=3* x=3x \\ last=3*3=9 \end{gathered}`

Combining the values above

`x^2+3x+3x+9=x^2+6x+9`

The answer is: x²+6x+9